Air diffuser



FIG. 1 is a rear view illustration of an air diffuser, according to anaspect of our new design.

FIG. 2 is a top, front, left side perspective view illustration thereof.

FIG. 3 is a front view illustration thereof.

FIG. 4 is a right side view illustration thereof.

FIG. 5 is a left side view illustration thereof.

FIG. 6 is a bottom view illustration thereof; and,

FIG. 7 is a top view illustration thereof.

CLAIM The ornamental design for air diffuser, as shown and described.